The Complete wp-config.php Performance Tuning Guide

Originally published at https://makewpfast.com/the-complete-wp-config-php-performance-tuning-guide/ The wp-config.php file is the control center of your WordPress installation. Most tutorials only cover database credentials, but this file holds the keys to significant performance improvements. Memory Limits define ( 'WP_MEMORY_LIMIT' , '256M' ); define ( 'WP_MAX_MEMORY_LIMIT' , '512M' ); WP_MEMORY_LIMIT applies to frontend requests. WP_MAX_MEMORY_LIMIT applies to admin tasks like updates and image processing. Set these based on your server capacity — going too high wastes memory, too low causes crashes. Post Revisions define ( 'WP_POST_REVISIONS' , 5 ); By default, WordPress saves unlimited revisions for every post. A post edited 100 times has 100 revisions in the database. Setting this to 5 keeps the safety net while preventing database bloat. Set to false to disable entirely. Autosave Interval define ( 'AUTOSAVE_INTERVAL' , 120 ); Default is 60 seconds. On busy sites with many simult